A comparison between ampicillin and tetracycline in purulent chronic bronchitis.
D000667:Ampicillin / Q000627:therapeutic use*; D001991:Bronchitis / Q000188:drug therapy*; D002986:Clinical Trials as Topic; D006801:Humans; D013183:Sputum / Q000382:microbiology; D013752:Tetracycline / Q000627:therapeutic use*
D000667:Ampicillin; D013752:Tetracycline